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Finding the Fourth Proportional to 470.57, 650.05 and 401.39

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Solution

The fourth proportional to 470.57, 650.05 and 401.39 is: 554.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.57 : 650.05 = 401.39 : x
  2. Step 2: Convert to fraction form
    470.57/650.05 = 401.39/x
  3. Step 3: Cross multiply
    470.57x = 650.05 × 401.39
  4. Step 4: Simplify right side
    470.57x = 260,919.32
  5. Step 5: Solve for x
    x = 260,919.32/470.57
  6. Step 6: Final answer
    x = 554.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.